audi A3 power loss vag com fault negative deviation

[ste_1210]

be having few problems with my a3 not running to good normaly my car would boost to 18/19 psi now im lucky to get 16 got it on vagcom im getting a error saying negative deviation.... anyone know what that is
iv replace most of the hoses cant see anything else that could be wrong

any ideas guys!!!!

 

[klepto]

Sounds like a boost leak or maybe faulty N75 valve, has your car been remapped? Negative deviation is actual boost delivered being less than the requested boost I had similar issue after a remap, took it back to have remapped again and its been fault free so far. Although there still could be an underlying problem! Quite tricky to pin down..

 

[ste_1210]

well the car was mapped long before i got it its only laterly its been goin down hill.
iv been round most of the hoses might need to get the front bumper off to see if any of the hoses goin to the front mount havve split. might have to try new n75 see if it fixes the problem bloomin modified cars hehehe